MAX212C データシートの表示（PDF） - Maxim Integrated

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MAX212C

+3V-Powered, Low-Power, True RS-232 Transceiver

Maxim Integrated 

TRANSMITTER OUTPUT VOLTAGE vs.

LOAD CURRENT PER TRANSMITTER

6

T1OUT AND T2OUT

4

2

T1IN AND T2IN = GND,

T3IN = VCC = 3.0V,

T3OUT, T2OUT, T1OUT

0 ALL LOADED

SIMULTANEOUSLY

-2

-4

T3OUT

-6

1

2

3

4

5

6

LOAD CURRENT PER TRANSMITTER (mA)

Figure 3. Mouse Emulation Circuit Current

+3V-Powered, Low-Power,

True RS-232 Transceiver

Maxim’s MAX560 and MAX561 are EIA/TIA-562 trans-

ceivers that operate on a single supply from 3.0V to

3.6V, and the MAX562 transceiver operates from 2.7V

to 5.25V while producing EIA/TIA-562 levels.

______________________Evaluation Kit

The MAX212 evaluation kit (EV kit) is a fully assem-

bled and tested, surface-mount demonstration board

that provides quick and easy evaluation of the

MAX212.

The MAX212 EV kit is intended for 3.3V ±300mV-pow-

ered EIA/TIA-232E and V.28/V.24 communications

interfaces where 3 drivers and 5 receivers are needed

with minimum power consumption.

A logic or pin-selectable shutdown mode reduces

current to 1µA. While shut down, all receivers can

remain active or can be disabled under logic control

via the EN input.

tions where power consumption is especially critical,

the EIA/TIA-562 standard provides an alternative.

EIA/TIA-562 transmitter output voltage levels need only

reach ±3.7V, and because they need only drive the

same 3kΩ receiver loads specified by RS-232, total

power consumption is considerably reduced. Since the

EIA/TIA-232E and EIA/TIA-562 receiver input voltage

thresholds are the same, interoperability between the two

standards is guaranteed and devices from both stan-

dards will communicate with each other successfully.

Figure 4. MAX212 Evaluation Kit

_______________________________________________________________________________________ 7

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